Home / 877,520.70-1,316,281.05-428,529.60

Finding the Fourth Proportional to 877,520.70, 1,316,281.05 and 428,529.60

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Solution

The fourth proportional to 877,520.70, 1,316,281.05 and 428,529.60 is: 642,794.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,520.70 : 1,316,281.05 = 428,529.60 : x
  2. Step 2: Convert to fraction form
    877,520.70/1,316,281.05 = 428,529.60/x
  3. Step 3: Cross multiply
    877,520.70x = 1,316,281.05 × 428,529.60
  4. Step 4: Simplify right side
    877,520.70x = 564,065,391,844.08
  5. Step 5: Solve for x
    x = 564,065,391,844.08/877,520.70
  6. Step 6: Final answer
    x = 642,794.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.